Hi i have about a one month old tank with about 2 to 3 inches of carib sea fine sand. I was told that anything over 4 inches deep you should not siphon but i see bubbles in the sand which i presume are nitrogen gas. Does this mean i should not siphon the sand. Its a 30 gallon tank and i have 1 nessarius some crabs and snails two clowns a hammer a frogspawn and some zoas. Also should i get a sand sifting starfish. I have heard conflicting ideas about putting a sand sifter in a tank this size.


